Piloto Osvaldo Marques Dias Airport, coded AFL/SBAT, serves Alta Floresta, a city in the northern part of Mato Grosso state in Brazil. The airport provides an essential air link for a region whose road access can be challenging, particularly during the rainy season, making it a vital hub for both passengers and cargo. The airport is named after Osvaldo Marques Dias, a pioneering aviator associated with the development of aviation in the region. It handles domestic routes connecting Alta Floresta to major Brazilian cities, supporting the local agricultural economy and ecotourism tied to the nearby Amazon rainforest. Alta Floresta is recognized for its proximity to the Cristalino State Park, a significant ecotourism destination, and the airport plays a role in bringing visitors to this biodiverse area.